ECG voltage modifications as response to gravity changes.
J Gravit Physiol
; 11(2): P87-8, 2004 Jul.
Article
en En
| MEDLINE
| ID: mdl-16235427
The aim of the study was to analyze ECG (QRS) voltage responses to body fluid shift due to gravity chances. Acute changes in gravity were created by two ways: 1) changes in gravity value during parabolic flights (within 27 subjects 45 ECG have been analyzed); 2) changes in gravity direction due to rotation of the body during postural tests (within 11 subjects 14 ECG have been analyzed). Results and conclusions. Gravity change leads to body fluid shift and changes of intrathoracic organs and tissues electroconduction. It influences on ECG voltage. During parabolic flights in up-right position: R amplitude in Z axis increases in hypergravity (+0.19 mV) and decreases in microgravity (-0.24 mV). During postural tests, R amplitude in Z axis increases in orthostatic position (+0.09 mV) and decreases in antiorthostatic position (-0.025 mV). Changes in QRS voltage during parabolic flights are more important than during postural tests. This could be due to more effective blood redistribution during parabolic flights.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Vuelo Espacial
/
Ingravidez
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Simulación de Ingravidez
/
Transferencias de Fluidos Corporales
/
Electrocardiografía
Límite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Gravit Physiol
Asunto de la revista:
FISIOLOGIA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Rusia
Pais de publicación:
Estados Unidos